By BeauHD from Slashdot's porn-crackdown department:On Monday, Tumblr announced that it will permanently ban adult content from its platform on December 17th, alienating a large portion of the site's users who enjoy sharing and consuming NSFW content. Motherboard has surfaced a study conducted in 2017 by two Italian universities and Bell Labs, which found that roughly a quarter of Tumblr users were on the platform largely to consume pornography. From the report: This study was based on the behavior of 130 million users, about half of Tumblr's entire user base. Of that number, "adult content consumers are 22 percent of our sample," the study said. "At the time of the study, roughly 30 million active accounts were consuming adult content, either re-sharing it or following the accounts of those producers," Luca Aiello, one of the study's authors and now a senior research scientist at Nokia Bell Labs told Motherboard in an email. "I expect this audience to experience a noticeable drop in engagement: some of them will just churn out, many of them will likely reduce considerably the time spent on the platform."